There is interest in developing sustainable materials displaying circularly polarized room-temperature phosphorescence, which have been scarcely reported. Here, we introduce biobased thin films exhibiting circularly polarized luminescence with simultaneous room-temperature phosphorescence. For this purpose, phosphorescence-active lignosulfonate biomolecules are co-assembled with cellulose nanocrystals in a chiral construct. The lignosulfonate is shown to capture the chirality generated by cellulose nanocrystals within the films, emitting circularly polarized phosphorescence with a 0.21 dissymmetry factor and 103 ms phosphorescence lifetime. By contrast with most organic phosphorescence materials, this chiral-phosphorescent system possesses phosphorescence stability, with no significant recession under extreme chemical environments. Meanwhile, the luminescent films resist water and humid environments but are fully biodegradable (16 days) in soil conditions. The introduced bio-based, environmentally-friendly circularly polarized phosphorescence system is expected to open many opportunities, as demonstrated here for information processing and anti-counterfeiting.

人们对开发显示圆偏振室温磷光的可持续材料很感兴趣，但这很少有报道。在这里，我们介绍了具有圆偏振发光和同时室温磷光的生物基薄膜。为此，将磷光活性木质素磺酸盐生物分子与纤维素纳米晶体共同组装成手性结构。木质素磺酸盐能够捕获薄膜内纤维素纳米晶体产生的手性，发射圆偏振磷光，不对称因子为 0.21，磷光寿命为 103 毫秒。与大多数有机磷光材料相比，该手性磷光体系具有磷光稳定性，在极端化学环境下不会出现明显的衰退。同时，发光薄膜可抵抗水和潮湿环境，但在土壤条件下可完全生物降解（16 天）。所引入的生物基环保圆偏振磷光系统预计将带来许多机会，如信息处理和防伪所示。